A few questions raised

I thought it was weird how the Engineer used brute force and not some kind of sophisticated weapon to kill Weyland and the others, granted he just woke up from cryosleep or whatever but it just made him look primal instead of godlike. I always thought of them as being an elegant race. Another issue i had was why they would guide humans to a military complex instead of their home world? seeing as some of the cave paintings were older than 2000 years. That means they weren't pissed off at us then, but then something happened which made them want to destroy us? What is the correlation between the urns and the eggs? seeing as the eggs already contain a Facehugger ready to wreak havoc while the urns contain a black goo that essentially kickstarts evolution in "X" species with an aggressive overtone for some reason. Wouldn't the urns be considered an incomplete form of bio-weapon? Also i would have liked to know more detailed technical stuff about the anatomy of the Engineer head they found and David doing analysis on the "containers" he found in the urn. i know it would probably just slow down the plot but I'm a sucker for that kinda stuff. I still enjoyed the rest of the movie immensely, a solid 8/10. and i don't understand the criticism toward the score either since i thought it was very good.